Planograpii co



W. W. NOBBS.

VENILATOR.

APPLxcATloN man 061.1. 1915.

1,310,429. Patented July 22, 1919.

WALTER WILLIAM NoBBs, or LONDON, ENGLAND. 'j

VENTILATOR.

Specification of Letters Patent.

Patented' Jury 22, 1919.

Application filed October 1, 1915. Serial No. 53,593.

To all whom 'it may concern.'

Cil

Be it known that I, WALTER WILLIAM NoBBs, a subject ofthe King of` Great Britain, residing at 71 I-Iaverstock Hill, London, England, have invented certain new and useful Improvements in Ventilators, of which the following is a full, clear, and exact description, reference being had yto -the accompanying drawing, which forms a part of this specification.

My invention relates to a ventilator of the type in which is `provided an air conduit, having the usual regulating grating at one end and an air filter located in` the conduit behind or below the grating depending upon whether the conduit is vertically or horizontally arranged. It is an object of my invention to provide an air filter of large surface compared `withthe cross sectional area of the conduit, and which may be readily inserted and removed from the conduit without removing the grating or a radiator or other object which may be disposed in front of or above said grating. It is also an object of my invention to so shape the filter and so arrange it relativeto the conduit, that foreign matter liltered from the air passing through the conduit, will be stopped and defiected by the lter to a position from which' it may be readily removed. Y

These objects I obtain by the construction described in the annexed specification and illustrated in the accompanying drawn ings in which- Figure l is a vertical section through one form of the ventilator substantially on the line I-I of Fig. 2, the relative position of the usual radiator being shown in dotted lines;

Fig. 2 is a front elevation of the ventilator;

Fig. 3 is a section of the ventilator on the line I-I of Fig. 2 with the grating and filter removed;

Fig. 4 is a horizontal section on the line IV-IV of Fig. 3 and Figs. 5 and 6 are views similar to Fig. l, showing modified forms of filters.

Similar reference characters refer to similar parts throughout the views.

Referring now to the drawings; b represents a conduit or air passage, which in the embodiment of the invention is an opening through the wall of a building for the purpose of conducting fresh and. cold air from the exterior of the building to the interior thereof; At the inner end of the conduit is located a ventilator frame forming in part an end closure a preferably set in fiush with the interior wall of the building.

As shown in the drawing this frame is rectangular, and serves as a support for the grating Z provided with the usual regulating shutters fw. The vertical dimension of the grating l is less than that of the frame a. thus providing a narrow rectan' gular opening through which access may be had to the conduit 5. In the form of the invention shown in Figs. 1 to 4 this opening is provided with a door it hinged at the bottom to? suitable projections on the frame a and held in closed position by the latch l.

The position of the usual radiator relative to the ventilator is indicated in Fig. 1 in dotted lines. As shown a radiator f of the well known type rests on a saddle o suspended from the bracket g by bolts p. A hook connection indicated at o may be used to further secure the radiator in place. As will more clearly appear hereinafter it is not necessary to disturb the radiator either to clean the conduit or to insert the air filter,y so that the radiator may be permanently secured in position.

As shown more clearly in Figs. 3 and 4, the vertical walls of the frame a are provided'with'curved grooves or guides i preferably increasing in width at the lower ends thereof. These grooves form the support for a curved air filter e. The lter may be composed of the usual air filtering material preferably a wire screen of fine mesh.

By making t-he filter curved, a large filter ing surface is provided and the filter may be readily inserted and removed. For example, in the embodiment of the invention shown in Figs. l to 4, the filter e may be inserted beneath the radiator and grating through the door it, the filter being shown in dotted lines in the position it occupies just before insertion and in full lines in the position it occupies after insertion in the conduit Z The grooves serve as guides while the filter is being inserted, the wide lower end of such grooves facilitating such insertion. It is apparent that the filter e may be readily inserted and removed without disturbing either the grating cl or .radiator f. Obviously also the filter may sol be formed of flexible material and the guide grooves i relied upon to give the surface of the filter a curved form after it has been inserted.

In the modification of the invention shown in Fig. 5 the grooves z' in the frame b are given a slightly different form from those shown in Fig. l; these grooves starting from the upper and outer corners of the side Walls, gradually curving to the inner lower corners. While the curvature of the filter in this case is not as great as in Fig. 1, the filter serves to deflect foreign matter filtered from the air in the conduit to a point adjacent the door It through Which it may be readily removed.

In the modified form of the invention shown in Fig. 6 the filter e is hinged to the door 7L Which in this case is not attached to the frame a. The upper edge of the filter is provided with apertures Which engage hooks or studs When the filter is inserted. In this modification when the door h is removed the filter is removed With it.

Obviously the amount of curvature of the filter e when once inserted may vary within Wide limits Without departing from the spirit of the invention as it is conceivable that even a substantially fiat surfaced filter could be employed if of sufiicient flexibility closure, an air filter, means for holding said air filter in substantially transverse position in said conduit, a grating centrally carried by said end closure, and an opening in said end closure separate from and situated on one side of said grating and so related to said holding means that said air filter may be removed and replaced therethrough Without disturbing said grating.

2. A ventilator comprising an air conduit having continuous side Walls and an end closure, an air filter, grooves or guides carried by said side Walls for holding said air filter in position substantially transverse to said conduit, one end of said grooves or guides being adjacent said end closure and a narrow opening in said end closure adjacent the ends of said grooves or guides through Which said air filter may be removed and replaced.

3. A ventilator comprising an air conduit having continuous side Walls and an end closure, a curved air filter, curved grooves or guides carried by said side Walls for holding said air filter in position substantially transverse to said conduit, the lower portion of said air filter as held by said grooves or guides being nearer said end closure than the central position thereof and a door provided for an opening in said end closure at the bottom thereof, such opening being adjacent the ends of said grooves or guides and the loWer portion of said air filter whereby said air filter may be removed and replaced.

WALTER l/VILLIAM NOBBS.

Witnesses: E. W. ADAMS, O. J. WoR'rvH.

Copies of this patent may be obtained for ve cents each,` by addressing the Commissioner of Patents, Washington, D. C. 

